Messages in this thread | | | Date | Wed, 6 Sep 2023 10:30:51 +0530 | Subject | Re: [PATCH RESEND 0/7] Add GPLL0 as clock provider for the Qualcomm's IPQ mailbox controller | From | Kathiravan Thirumoorthy <> |
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On 9/6/2023 10:26 AM, Kathiravan Thirumoorthy wrote: > Currently mailbox controller takes the XO and APSS PLL as the input. It > can take the GPLL0 also as an input. This patch series adds the same and > fixes the issue caused by this. > > Once the cpufreq driver is up, it tries to bump up the cpu frequency > above 800MHz, while doing so system is going to unusable state. Reason > being, with the GPLL0 included as clock source, clock framework tries to > achieve the required rate with the possible parent and since GPLL0 carries > the CLK_SET_RATE_PARENT flag, clock rate of the GPLL0 is getting > changed, causing the issue. > > First half of the series, removes the CLK_SET_RATE_PARENT flag from the > PLL clocks since the PLL clock rates shouldn't be changed. Another > half, add the necessary support to include the GPLL0 as clock provider > for mailbox and accomodate the changes in APSS clock driver. > > This is also the preparatory series to enable the CPUFreq on IPQ5332 > SoC. Dynamic scaling of CPUFreq is not supported on IPQ5332, so to > switch between the frequencies we need to park the APSS PLL in safe > source, here it is GPLL0 and then shutdown and bring up the APSS PLL in > the desired rate. > > For IPQ5332 SoC, this series depends on the below patch > https://lore.kernel.org/linux-arm-msm/1693474133-10467-1-git-send-email-quic_varada@quicinc.com/
My bad.. This is not a 'resend', this is V1.. I'm trying to get used to b4 and messed up... Will rectify it in future.
> > Signed-off-by: Kathiravan Thirumoorthy <quic_kathirav@quicinc.com> > --- > Kathiravan Thirumoorthy (7): > clk: qcom: ipq8074: drop the CLK_SET_RATE_PARENT flag from PLL clocks > clk: qcom: ipq6018: drop the CLK_SET_RATE_PARENT flag from PLL clocks > clk: qcom: ipq9574: drop the CLK_SET_RATE_PARENT flag from GPLL clocks > clk: qcom: ipq5332: drop the CLK_SET_RATE_PARENT flag from GPLL clocks > dt-bindings: mailbox: qcom: add one more clock provider for IPQ mailbox > clk: qcom: apss-ipq6018: add the GPLL0 clock also as clock provider > arm64: dts: qcom: include the GPLL0 as clock provider for IPQ mailbox > > .../devicetree/bindings/mailbox/qcom,apcs-kpss-global.yaml | 2 ++ > arch/arm64/boot/dts/qcom/ipq5332.dtsi | 4 ++-- > arch/arm64/boot/dts/qcom/ipq6018.dtsi | 4 ++-- > arch/arm64/boot/dts/qcom/ipq8074.dtsi | 4 ++-- > arch/arm64/boot/dts/qcom/ipq9574.dtsi | 4 ++-- > drivers/clk/qcom/apss-ipq6018.c | 3 +++ > drivers/clk/qcom/gcc-ipq5332.c | 2 -- > drivers/clk/qcom/gcc-ipq6018.c | 7 ------- > drivers/clk/qcom/gcc-ipq8074.c | 7 ------- > drivers/clk/qcom/gcc-ipq9574.c | 4 ---- > 10 files changed, 13 insertions(+), 28 deletions(-) > --- > base-commit: a47fc304d2b678db1a5d760a7d644dac9b067752 > change-id: 20230904-gpll_cleanup-8b3e8b058c8b > > Best regards,
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